In bowl of electric mixer, cream butter and sugars. Add eggs one at a time, beating well after each. Stir dry ingredients together. Combine starter and vanilla; add alternately with dry ingredients to sugar mixture. Spread in greased 11.5 x 7.5 x 4 cm pan. Sprinkle chocolate and nuts on top. Bake in preheated 180ºC oven 30 min. Posted By waring@ima.infomail.com (Sam Waring) On rec.food.recipes or rec.food.cooking